# Day tanks and fuel systems

Part ID: 7.13a · Layer 7 (Electrical: power distribution (grid to rack)) · child of 7.13

Fuel storage and delivery equipment that keeps diesel or HVO moving from bulk storage to the generator engines during extended runtime.

## Companies

| Company | Role | Confidence | Ownership | Ticker | Note |
|---|---|---|---|---|---|
| Preferred Utilities | manufacturer | inferred | private |  |  |
| Pryco | manufacturer | inferred | private |  |  |

Confidence tags: disclosed = company/filing statement; reported = trade press or partner list; inferred = taxonomy lead.